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Diaphragms made of stainless steel plates are widely used in switching parts in electrical devices, which control on/off of the electric supply of electric devices. However, there are many geometrical parameters for designing diaphragms such as height, diameter, and so on. The aim of the study is to estimate effects of the design parameters on click characteristics of diaphragms based on FEM. In the numerical analysis, the residual stress generated in the press forming has been investigated, and the click characteristics such as load and click ratio were estimated with the numerical model by changing the geometry of several diaphragms. Finally, the relationship between design parameter and click characteristics was defined as ‘design space’, and we could obtain the designable area by controlling the design parameters. Furthermore, if the diameter of a diaphragm was changed, we could choose the diaphragm by controlling the design parameters based on the proposed designable area. From these results, the proposed design space is useful for the estimation of the designable region of diaphragm considering click characteristics.

Effects of Design Parameters on Click Characteristics of A Round-Type Diaphragm for Push Momentary Switch